基于物元模型和分形理论的流域环境变化研究

发布时间：2018-01-12 10:16

本文关键词：基于物元模型和分形理论的流域环境变化研究　出处：《人民黄河》2017年11期 　论文类型：期刊论文

【摘要】：将浙江省苕溪流域生态系统细分为社会经济、生态环境和环保支持三个子系统并分别建立指标体系,采用权重经熵值修正的物元模型对1998年、2003年和2008年的指标值进行分析和评价。结果表明:社会经济子系统状态从较合理转变为不利于生态环境健康发展;生态环境状态隶属于亚健康等级,综合关联度从1998年的-0.235 0增大到2008年的-0.083 3,呈现出逐步远离健康状态的趋势;污染控制、环保投入和环境管理等措施的力度从1998年的不足逐步得到改善。采用分形理论评价整个苕溪流域生态系统的综合状态,三年的分维度依次为0.619 4、0.674 9、0.680 6,说明苕溪流域在城市化作用下正面临不断增大的压力和胁迫,朝着逆向、不健康的方向发展。综合分析表明,苕溪流域城市化发展已对整个生态系统造成诸多不利影响,因此未来城市发展与土地利用中应更加重视生态环境保护,以实现流域生态系统稳定、健康、有序发展。
[Abstract]:The ecosystem of Tiaoxi watershed in Zhejiang Province was subdivided into three subsystems of social economy, ecological environment and environmental protection support, and the index system was established respectively. The matter element model of weight modified by entropy value was adopted in 1998. The index values of 2003 and 2008 were analyzed and evaluated. The results showed that the state of social economic subsystem changed from reasonable to unfavorable to the healthy development of ecological environment. The ecological environment belongs to the sub-health grade, the comprehensive correlation degree increases from -0.2350 on 1998 to -0.083 3 on 2008, showing a trend of being away from the healthy state step by step. The measures of pollution control, environmental protection investment and environmental management were gradually improved from the deficiency in 1998. Fractal theory was used to evaluate the comprehensive state of the whole ecosystem of Tiaoxi River Basin. The subdimension of three years was 0.619 4, 0.674 9 and 0.680 6, which indicated that Tiaoxi watershed was facing increasing pressure and stress under the action of urbanization, and was facing the reverse trend. Comprehensive analysis shows that the development of urbanization in Tiaoxi basin has caused many adverse effects on the whole ecosystem. Therefore, more attention should be paid to ecological environment protection in the future urban development and land use. In order to achieve stable, healthy and orderly development of watershed ecosystem.
【作者单位】：浙江省水利水电勘测设计院;
【基金】：国家科技重大专项(03-Y20A04-9001-15/16,30-Y20A29-9003-15/17) 浙江省水利科技计划项目(RB1510,RC1112)
【分类号】：F127;X171.1
【正文快照】： 城市化是一种强烈的地表人类活动过程,对资源及生态环境会产生剧烈影响,而这种影响反过来又可能对城市化进程形成约束[1-2]。我国正进入城镇化加速发展阶段,城市规模快速扩张,由此带来的生态环境问题已成为制约我国城市可持续发展的重要因素[3]。水是生命之源、生产之要、生态

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